Short answers, can't sit long.
Boeing has by far the most experience in building aerial refueling platforms. They've been the innovators from the start.
Boeing builds a "belts and suspenders" airplane. They are overengineered; there are backups to the backup to the primary. I can't tell you how many times in my career I blessed Boeing engineers. OTOH, Airbus tends the other way; they're built to meet the minimum requirements.
Lastly, my brother was on final, in the WX a PHL in a US Air A-330. The Captain was the pilot flying; inside the marker, the Captains EFIS screens all went blank. My brother assumed control. About 30 seconds later, my brother's EFIS screens went blank. By the book, this is "impossible". It just can't happen. Just as the "oh SHIRT!!" echoes died out in the cockpit, my brother's EFIS came back to life.
Neither the Airbus or Maintenance guys could explain how that happened....... so it was eventually ignored.
Sorry guys. Boeing only for me. They're overbuilt, overengineered and they always brought me home.